RSA-1500L User Manual
RSA-1500L User Manual
Version 1.2
2008/01/24
This document contains information highly confidential to RoyalTek Company
LTD (RoyalTek). It is provided for the sole purpose of the business discussions
between supplier and RoyalTek and is covered under the terms of the
applicable Non-Disclosure Agreements. Disclosure of this information to other
parties is prohibited without the written consent of RoyalTek.
Prepared by RoyalTek Company LTD.
1071, Chung Cheng Rd., Suite 9F-1
Tao Yuan City, Taiwan
Tel: 886-3-3569666
Fax: 886-3-3580050
RSA-1500L User Manual
Figure List
Figure 1-1 RSA-1500L Front View......................................................................... 5
Figure 1-2 RSA-1500L Bottom View ..................................................................... 5
Figure 1-3 System Block Diagram........................................................................ 5
Figure 1-4 Application Circuit Reference............................................................. 8
Figure 1-5 Mechanical Layout............................................................................... 9
Figure 1-6 Hardware Interface............................................................................. 10
Figure 3-1 Package Specifications..................................................................... 17
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RSA-1500L User Manual
Table List
Table 1-1 Technical Specifications ....................................................................... 6
Table 1-2 Definition of Pin assignment .............................................................. 10
Table 2-1 NMEA-0183 Output Messages............................................................ 12
Table 2-2 GGA Data Format................................................................................. 12
Table 2-3 Position Fix Indicators ........................................................................ 13
Table 2-4 GLL Data Format.................................................................................. 13
Table 2-5 GSA Data Format ................................................................................. 14
Table 2-6 Mode 1................................................................................................... 14
Table 2-7 Mode 2................................................................................................... 14
Table 2-8 GSV Data Format ................................................................................. 15
Table 2-9 RMC Data Format................................................................................. 15
Table 2-10 VTG Data Format................................................................................ 16
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RSA-1500L User Manual
1 Introduction
RoyalTek RSA-1500L low power and small form factor board is the newest generation
of RoyalTek smart antenna GPS module. The smart antenna GPS module is powered
by SiRF Star III technology and RoyalTek proprietary navigation algorithm that
providing you more stable navigation data. Parallel design is the major new feature of
RSA-1500L.
The smallest form factor and parallel design is the best choice to be embedded in a
portable device and receiver like PND, mobile phone, car holder, personal locator,
digital camera and vehicle locator. The excellent sensitivity of RSA-1500L gets the
great performance when going though the urban canyon and foliage
Product Features
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20 parallel channels
Extreme fast TTFF at low signal level
Operable from 3.3V/48mA continuous mode.
Wire to board connector
TCXO design
0.1 second reacquisition time
Small form factor with embedded SiRF Star III single chip technology.
NMEA-0183 compliant protocol/custom protocol.
4 Mbits Flash Memory
Enhanced algorithm for navigation stability
Excellent sensitive for urban canyon and foliage environments.
SBAS (WAAS, EGNOS and MSAS) support
Auto recovery while RTC crashes
Trickle power supported
1.1 Product applications
Automotive navigation
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Personal positioning and navigation
Marine navigation
Timing application
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RSA-1500L User Manual
1.2 Product Picture
RSA-1500L
Figure 1-1 RSA-1500L Front View
Figure 1-2 RSA-1500L Bottom View
1.3 RSA-1500L System Block Diagram
System block diagram description :
a. External antenna.
b. 4 Mega bits flash memory
c. 6 pin I/O pin
Figure 1-3 System Block Diagram
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RSA-1500L User Manual
1.4 RSA-1500L Technique Specification
Table 1-1 Technical Specifications
Impedance：50Ω
No
Function
Specification
GPS receiver
SiRF Star III, GSC3f/LP
1
Chipset
(Digital, RF in a single package)
2
3
4
5
6
7
8
9
Frequency
Code
L1 1575.42MHz.
C.A. Code.
Channels
20 parallel
Chipset Sensitivity
Cold start
-159dBm.
35 sec @ open sky
Warm start
Hot start
35 sec @ open sky
1 sec @ open sky
Reacquisition
0.1sec typical
10 Position accuracy
11 Maximum altitude
10meters at 2D RMS.
18000 m
12 Maximum velocity
13 Trickle power mode
14 Update rate
514 m/s
40mA@Average
Continuous operation: 1Hz
15 Testability
It shall be able to be tested by SiRF test IV and single channel
simulator.
16 Protocol setup
17 DGPS
It shall store the protocol setup in the SRAM memory.
1.WAAS, EGNOS
Interface
18 LNA
25dB Gain. (Typical)
6pin
19 I/O Pin
Mechanical requirements
20 Weight
8.3g Typ.
Power consumption
21 Vcc
DC +3.3 V 5%
22 Current
GPS :
Avg Acquisition <[email protected] without ext.Antenna
Avg Tracking <[email protected] without ext.Antenna
Environment
6
RSA-1500L User Manual
-25 ~ 85℃
23
Operating
temperature
24
25
Storage temperature -40 ~ 85℃
≦95%
Humidity
MMCX edge mount Jack Receptacle specification (External Antenna)
Impedance
50ohm
Frequency range
V.S.W.R
0~6GHz
1.2max
Working voltage
Durability
175Vrms max
500 mating
External Antenna spec.
2.85V±2%
20mA max.
≦-10dB
DC supply
DC current
Input return Loss
Output return Loss
Gain
≦-10dB
25 dB typical
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RSA-1500L User Manual
1.5 Application Circuit
Figure 1-4 Application Circuit Reference
Note:
(1) Ground Planes:
This pin2 should be connect to ground.
(2) Serial Interface:
(Ⅰ) The TXA pin is recommended to connect to serial resistance(220Ω)
and pull up (10KΩ). It can increase the stability of serial data. (Default
NMEA)
(Ⅱ) The RXA pin is recommended to connect to serial resistance(220Ω)
and pull up (10KΩ). It can increase the stability of serial data. (Default
NMEA)
(3) Backup Battery:
When module is working, must to supply VCC pin(Pin1) and VBATT
pin(Pin6) power at the same time.
It’s recommended to connect a backup battery to VBATT pin.
In order to enable the warm start and hot start features of the GPS receiver.
If you use backup battery, should be add a bypassing capacitor (10uF) at
VBATT pin. It can reduce noise and increase the stability.
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RSA-1500L User Manual
(4) Power:
Connect VCC pin to DC 3.3V. The power supply must add bypass
capacitor(10uF and 1uF).It can reduce the Noise from power supply and
increase power stability.
(5) GPIO:
The GPIOs function are for customer used.
If no use GPIO function, it don’t connect anything.
1.6 Mechanical Layout
Figure 1-5 Mechanical Layout
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RSA-1500L User Manual
1.7 Hardware interface
Figure 1-6 Hardware Interface
Table 1-2 Definition of Pin assignment
Pin Defined
Pin Signal Name
I/O Description
Characteristics
DC +3.3V 5%
1
VCC
I
DC Supply
Voltage input
Ground
2
3
GND
TXA
G
O
Reference Ground
Serial port A
2.85V ≥ VOH ≥ 2.38V
VOL ≤ 0.7V
- 0.3V ≤VIL ≤ 0.86V
4
5
RXA
I
Serial port A
3.15V ≥ VIH ≥ 2.0V
3.15V ≥ VIH ≥ 2.0V
2.85V ≥ VOH ≥ 2.14V
GPIO-1
I/O General
purpose I/O
- 0.3V ≤VIL ≤ 0.86V
VOL ≤ 0.71V
6
VBATT
I
Backup voltage
supply
DC + 2.5 ~ +3.6V
Current ≤ 10uA
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RSA-1500L User Manual
Definition of Pin assignment
VCC(+3.3V DC power Input)
This is the DC power supply input pin for GPS system. It provides voltage to
module.
GND
GND provides the reference ground.
TXA
This is the main transmitting channel and is used to output navigation and
measurement data to SiRFdemo or user written software
RXA
This is the main receiver channel and is used to receive software commands to
the board from SIRFdemo software or from user written software.
VBATT (Backup battery )
When module is working, must to supply VCC pin(Pin1) and VBATT pin(Pin6)
power at the same time.
This is the battery backup input that powers the SRAM and RTC when main
power is removed. Typical current draw is 10uA.
The supply voltage should be between 2.5V and 3.6V.
GPIO Functions
Several I/Os are connected to the digital interface connector for custom
applications.
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RSA-1500L User Manual
2
Software Interface
2.1 NMEA V3.0 Protocol
Its output signal level is TTL: 4800 bps (default), 8 bit data, 1 stop bit and no parity. It supports
the following NMEA-0183
Messages: GGA, GLL, GSA, GSV, RMC and VTG.
NMEA Output Messages: the Engine board outputs the following messages as shown in Table
2-1:
Table 2-1 NMEA-0183 Output Messages
NMEA Record
GGA
Description
Global positioning system fixed data
Geographic position – latitude / longitude
GNSS DOP and active satellites
GLL
GSA
GSV
GNSS satellites in view
RMC
Recommended minimum specific GNSS data
Course over ground and ground speed
VTG
2.1.1 GGA-Global Positioning System Fixed Data
Table 2-2 contains the values of the following example:
$GPGGA, 161229.487, 3723.2475, N, 12158.3416, W, 1, 07, 1.0, 9.0, M, , , ,0000*18
Table 2-2 GGA Data Format
Name
Message ID
Example
Units
Description
GGA protocol header
hhmmss.sss
$GPGGA
UTC Position
Latitude
161229.487
3723.2475
ddmm.mmmm
N/S Indicator
Longitude
N
N=north or S=south
Dddmm.mmmm
12158.3416
E/W Indicator
Position Fix Indicator
Satellites Used
HDOP
W
1
E=east or W=west
See Table 2-1
07
1.0
9.0
M
Range 0 to 12
Horizontal Dilution of Precision
MSL Altitude
Units
meters
meters
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RSA-1500L User Manual
Geoid Separation
Units
meters
M
meters
Age of Diff. Corr.
second Null fields when DGPS is not
used
Diff. Ref. Station ID
Checksum
0000
*18
＜CR＞＜LF＞
End of message termination
Table 2-3 Position Fix Indicators
Description
Value
0
1
Fix not available or invalid
GPS SPS Mode, fix valid
2
Differential GPS, SPS Mode, fix valid
Not Supported GPS PPS Mode, fix valid
Dead Reckoning Mode, fix valid
3-5
6
2.1.2 GLL-Geographic Position –Latitude/Longitude
Table 2-4 contains the values of the following
Example: $GPGLL, 3723.2475, N, 12158.3416, W, 161229.487, A*2C
Table 2-4 GLL Data Format
Name
Message ID
Latitude
Example
Units
Description
GLL protocol header
$GPGLL
3723.2475
ddmm.mmmm
N/S Indicator
Longitude
E/W Indicator
UTC Position
Status
N
N=north or S=south
Dddmm.mmmm
12158.3416
W
E=east or W=west
161229.487
hhmmss.ss
A
A
A=data valid or V=data not valid
A=Autonomous, D=DGPS, E=DR
Mode
Checksum
＜CR＞＜LF＞
*2C
End of message termination
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RSA-1500L User Manual
2.1.3 GSA-GNSS DOP and Active Satellites
Table 2-5 contains the values of the following example:
$GPGSA, A, 3, 07, 02, 26, 27, 09, 04, 15, , , , , , 1.8,1.0,1.5*33
Table 2-5 GSA Data Format
Name
Message ID
Mode 1
Example
Units
Description
GSA protocol header
$GPGSA
A
3
See Table 4-2
Mode 2
See Table 4-1
Satellite Used
Satellite Used
….
07
02
Sv on Channel 1
Sv on Channel 2
….
Satellite Used
PDOP
Sv on Channel 12
Position Dilution of Precision
Horizontal Dilution of Precision
Vertical Dilution of Precision
1.8
1.0
1.5
*33
HDOP
VDOP
Checksum
＜CR＞＜LF＞
End of message termination
Table 2-6 Mode 1
Description
Fix not available
2D
Value
1
2
3
3D
Table 2-7 Mode 2
Description
Value
M
A
Manual-forced to operate in 2D or 3D mode
Automatic-allowed to automatically switch 2D/3D
2.1.4 GSV-GNSS Satellites in View
Table 2-8 contains the values of the following example:
$GPGSV, 2, 1, 07, 07, 79, 048, 42, 02, 51, 062, 43, 26, 36, 256, 42, 27, 27, 138,
42*71$GPGSV, 2, 2, 07, 09, 23, 313, 42, 04, 19, 159, 41, 15, 12, 041, 42*41
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RSA-1500L User Manual
Table 2-8 GSV Data Format
Name
Message ID
Number of
Example
$GPGSV
2
Units
Description
GSV protocol header
Range 1 to 3
Messages1
Messages Number1
Satellites in View
Satellite ID
1
07
07
79
048
42
Range 1 to 3
Channel 1(Range 1 to 32)
Elevation
degrees Channel 1(Maximum 90)
degrees Channel 1(True, Range 0 to 359)
dBHz Range 0 to 99, null when not
tracking
Azimuth
SNR (C/No)
….
….
Satellite ID
Elevation
Azimuth
SNR (C/No)
27
27
Channel 4(Range 1 to 32)
degrees Channel 4(Maximum 90)
degrees Channel 4(True, Range 0 to 359)
dBHz Range 0 to 99, null when not
tracking
138
42
Checksum
*71
＜CR＞＜LF＞
End of message termination
1Depending on the number of satellites tracked multiple messages of GSV data may be required.
2.1.5 RMC-Recommended Minimum Specific GNSS Data
Table 2-9 contains the values of the following example:
$GPRMC, 161229.487, A, 3723.2475, N, 12158.3416, W, 0.13, 309.62, 120598, ,*10
Table 2-9 RMC Data Format
Name
Message ID
UTC Position
Status
Example
$GPRMC
161229.487
A
Units
Description
RMC protocol header
hhmmss.sss
A=data valid or V=data not valid
ddmm.mmmm
Latitude
3723.2475
N
N/S Indicator
Longitude
N=north or S=south
dddmm.mmmm
12158.3416
W
E/W Indicator
Speed Over Ground
E=east or W=west
0.13
knots
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RSA-1500L User Manual
Course Over
Ground
309.62
120598
degrees True
Date
ddmmyy
Magnetic Variation
Mode
degrees E=east or W=west
A
A=Autonomous, D=DGPS, E=DR
Checksum
*10
2.1.6 VTG-Course Over Ground and Ground Speed
Table 2-10 contains the values of the following example:
$GPVTG, 309.62, T, , M, 0.13, N, 0.2, K*6E
Table 2-10 VTG Data Format
Name
Message ID
Course
Example
$GPVTG
309.62
T
Units
Description
VTG protocol header
degrees Measured heading
True
Reference
Course
degrees Measured heading
Magnetic
Reference
Speed
M
0.13
N
knots Measured horizontal speed
Knots
Units
Speed
0.2
K
km/hr Measured horizontal speed
Kilometer per hour
Units
Mode
A
A=Autonomous, D=DGPS, E=DR
Checksum
＜CR＞＜LF＞
*6E
End of message termination
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RSA-1500L User Manual
3 Package
A.
.
3.1 Package Specification
Shipment Method: PE Bag
Figure 3-1 Package Specifications
4 Contact Information Section
H eadquarter:
1071, Chung Cheng Rd., Suite 9F-1,Tao Yuan City, Taiwan
Tel: 886-3-3569666
Fax: 886-3-3580050
5 Revision History
Title
RSA-1500L GPS Module
Doc Type User Manual
Revision
Date
Author
Change notice
Number
1.0
1.1
1.2
2007/08/08
2007/09/21
2008/01/24
Linda Fan
Linda Fan
Linda Fan
Initial Release
Current
Revised mechanical drawing
Copyright © 2006-2007, RoyalTek Company Ltd.
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